As time passes and the number of uses increases, the measurement accuracy of the infrared ear thermometer will gradually decline. Regular calibration can promptly detect and correct possible errors and extend the service life of the ear thermometer. For medical institutions, regular calibration can ensure the accuracy of diagnosis and reduce the risk of misdiagnosis; for family users, regular calibration can ensure accurate body temperature data in daily health monitoring, so as to detect abnormal changes in the body in time.